Recirculating toilet

ABSTRACT

A recirculating toilet employs an oil as a reusable, inoffensive, flushing fluid. Human waste products are collected, the oil is separated, and the waste products are periodically transferred for disposition. The flushing fluid is filtered and recycled for further use.

United States Patent [1 1 Rod et al.

[ Aug. 20, 1974 RECIRCULATING TOILET [75] Inventors: Robert L. Rod,Marina Del Rey;

Theodore M. Woltanski, Hawthorne,

both of Calif.

[73] Assignee: Monogram Industries, Inc., Santa Monica, Calif.

[22] Filed: Mar. 5, 1973 21 1 Appl. No.: 338,200

[52] US. Cl 4/10, 4/77, 4/80, 4/90 [51] Int. Cl E03d l/00, E03d 3/00,E03d 5/00 [58] Field of Search 4/1, 10, 131, 77, 79, 78, 4/70, 12, 76,89, 111, 114, 115, 249, 80, 90,

[56] References Cited UNITED STATES PATENTS 2,858,939 ll/l958 Corliss..4/10

3,032,776 5/1962 Obert et al 4/ 3,079,612 3/1963 Corliss 3,431,5633/1969 Rascov 3,487,475 l/l970 Minniear...

3,611,447 10/1971 Howard 3,673,614 7/1972 Claunch 4/10 PrimaryExaminer-Henry K. Artis Attorney, Agent, or Firm-Miketta, Glenny, Poms &Smith [5 7 ABSTRACT A recirculating toilet employs an oil as a reusable,inoffensive, flushing fluid. Human waste products are collected, the oilis separated, and the waste products are periodically transferred fordisposition. The flushing fluid is filtered and recycled for furtheruse.

15 Claims, 2 Drawing Figures REsERVmQ COAL- ga escek PuMP HOLDING TA mRECIRCULATING TOILET RELATED PATENTS AND APPLICATIONSIN THE PRIOR ARTThe most significant prior art is set forth in applica tions for patentsentitled Recirculating Toilet by Donald A. Dotson, et al., Ser. No.212,423, filed Dec. 27, 1971 and Oil Recovery System by Norris J.Bishton, Jr., Ser. No. 212,594, filed Dec. 27, I971, and in patentsissued to Obert, et al., US. Pat. No. 3,032,776; Rascov, US. Pat. No.3,431,563; and Claunch, US. Pat. No. 3,673,614.

BACKGROUND OF THE INVENTION 1. Field of the invention The presentinvention relates to recirculating sanitary systems and, moreparticularly, to a recirculating toilet system utilizing a flushingfluid of a lower density and specific gravity than the waste productsthat is immiscible therewith.

2. Description of the Prior Art Recirculating sanitary systems are nowwell known in the art and have been described and shown in the above setforth prior art patents and applications. Recirculating toilets of thevarious commercially available types have, for the most part, utilizedwater as the reusable flushing fluid.

It has been deemed a problem of the prior art, when considering thedisposal of waste products, that even the limited amounts of waterrequired in a recirculating toilet system consumed substantial amountsof energy in its disposition. Most prior art techniques have requiredthat the water component accompanying human wastes must either beextensively treated to bring it to a quality suitable for release intothe environment or that it be incinerated together with the other wasteproducts, thereby returning it to the environment in the form of watervapor.

In the above-identified applications of Dotson, et al., and Bishton,Jr., it was proposed that a recirculating toilet system utilize an oilas the flushing fluid to further limit the water component of the wastematerials. The

use of an oil had been suggested in the prior art patentsto Obert, etal., and Roscov, supra. Obert, et al., had taught the reuse of oil as aflushing liquid after the waste had been ground and transported to asettling tank. Because of the difference in specific gravity, theflushing liquid separated out as an upper layer and was siphoned offthrough a line for return to the flush tank or the reservoir. In otherembodiments, a fuel oil was used and was burned with the waste productsas a part of the normal combustion system producing power and heat.Similarly, Rascov taught an incinerating apparatus for immediatedisposition of the waste.

Most recently, the patent to Claunch, supra, taught a more or lessconventional toilet bowl and tank, which was connected to recirculate anonaqueous flush medium. A pressurized fluid reservoir stored fluid nototherwise held in the toilet tank. A special waste compartment wasprovided which enabled the separation of the flush medium from thewaste.

In Claunch, the waste products were admitted at the base of a separatingtank. The flush fluid was permitted to rise in the tank through a screenfilter above the waste to a storage area from whence fluid was withdrawnthrough a coalescer filter. The waste products were periodicallywithdrawn from the separating tank using level and weight sensors whichinitiated the operation of a macerator-grinder.

The waste was then transferred to a final disposal element, for example,an incinerator. Other sensors terminated the transfer operation when thelevel of the flush medium fell below a predetermined desired level.

The Claunch system included a number of floats and sensors, all of whichwere required to operate in the hostile environment of the wasteproducts. Further, the operation of the system depended upon the properand orderly operation of the plurality of sensors, switches, andelectrically operable valves, and a plurality of protective redundantswitches and alarm circuits were necessary for the operation of thesystem.

It has been deemed desirable to have a simplified recirculating systemthat is more reliable and more easily maintained. It has also been feltdesirable that some improved toilet fixture should be provided since theflushing fluid is not generally a solvent for the human waste productsthat must be accommodated by the system. Such a system should also beadapted for use with multiple toilets and a single fluid supply as partof a housing complex or in a large vehicle, such as a ship or largeaircraft.

SUMMARY OF THE INVENTION According to the present invention, arecirculating toilet system employs a nonaqueous flushing fluid in aspecially coated toilet bowl. In a preferred embodiment, the toilet bowlhas applied to the interior thereof a coating of Teflon, whichsubstantially enhances the flushing and bowl cleaning capability of theflushing fluid. The wastes are emptied into a large separating tank,having a substantially converging taper from top to bottom.

A vertical screen divides the tank into a solids collecting portion anda filtered fluid portion. A drain or dump valve at the base of the tankon the solids collecting portion side is connected to amacerator-grinder pump which, when energized, finely comminutes andtransports the wastes as a slurry to an alternative receptacle.

The flushing fluid overlies the waste products in the tank. A floatingintake is mounted in the separating tank on the filtered fluid side tocollect flushing fluid from near the upper surface. A pump connected tothe intake withdraws flushing fluid from the tank and passes the fluidthrough a coalescer and a filter and returns the fluid to a more or lessconventional toilet tank mounted on the toilet bowl. The toilet tank maycontain the conventional siphon valve and ball cock assembly with afloat, which closes the valve when a proper fluid level has beenreached. The pump can be energized by a switch coupled to the flushcontrol, a switch which may be operated by the tank float or by a switchconnected to the intake float in the separating tank.

The pump can operate until either the float terminates the fillingoperation or a pressure sensor detects the closure of the siphon valveand the resulting pressure build-up in the line between the pump and thetoilet tank.

Periodically, as the level of the waste products rises in the separatingtank, the dump valve and maceratorgrinder can be operated to remove theaccumulated wastes. Means are provided to close the dump valve beforeany of the flushing liquid reaches the valve.

In alternative embodiments, a plurality of toilets, each with its owntank, drain through a common waste line to a separating tank. A floatingintake in the separating tank is coupled to a pump which returns fluidto a main reservoir which, in turn, refills the several toilet tanks asthe toilets are operated.

The operation of the pump can be initiated by a rise in the level offlushing fluid above a predetermined level in the separating tank andterminated either by a predetermined drop in level in the separatingtank or fluid above a predetermined level in the reservoir. In thisembodiment, the toilets, except for the special coating of the bowl, canbe substantially conventional without other modification. However, thetoilet tanks can be eliminated if an appropriate flush control isprovided which admits a predetermined volume of fluid to the bowl foreach use.

The novel features which are believed to be characteristic of theinvention, both as to organization and method of operation, togetherwith further objects and advantages thereof, will be better understoodfrom the following description considered in connection with theaccompanying drawings in which several preferred embodiments of theinvention are illustrated by way of example. It is to be expresslyunderstood, however, that the drawings are for the purpose ofillustration and description only and are not intended as a definitionof the limits of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram of a recirculatingtoilet system according to the present invention; and

FIG. 2 is a diagram of a multiple toilet recirculating system accordingto the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Turning first to FIG. 1, thereis illustrated a recirculating toilet system according to the presentinvention. The system includes a toilet 12 with an attached tank 14mounted to a floor structure 16. A conventional sanitary trap 18connects the toilet 12 to the waste pipe 20, which empties into aseparating tank 22.

Normally, flushing fluid 24 is stored in the tank 14, and as withconventional systems, an additional quantity of fluid stands in the bowl12 supported by the sanitary trap 18, which creates an odor seal betweenthe toilet 12 and the tank 22. The toilet tank 14 may include aconventional filling mechanism, such as a float operated valve or ballcock which, when the tank 14 is empty, admits flushing fluid 24. Whenthe fluid 24 in the toilet tank 14 rises above a predetermined level,the float closes the valve to further fluid.

The separating tank 22, in the preferred embodiment, has an invertedtaper shape and is wider at the top than at the base. A filter screen 26vertically divides the separating tank 22 roughly in half into a solidscollecting portion and a filtered fluid portion. The screen 26 is of amesh sufficiently fine to prevent the passage of most waste solids andpaper products that are normally found in a toilet system.

The fluid component of the waste, however, can of course pass throughthe screen 26. In the solids collecting portion of the tank 22, a drainor dump valve 28 is placed in the base thereof and communicates with amacerator-grinder pump 30. In the other half of the separator tank 22,an intake float 32 is pivotally mounted with a flexible coupling to theedge of the tank 22 and is provided with a plurality of intake orifices,intended to withdraw fluid 24 from just below the upper surface. I

An intake line 34 goes from the intake float 32 to a pump 36, the outputof which is applied to a coalescer 38 and a filter 40. Any wasteproducts collected in the coalescer 38 are returned through a drain line42 to the waste side of the tank 22 for subsequent disposition. Theoutput of the filter 40 is applied to the toilet tank 14 through theball cock valve thereof.

Normally, waste products will collect in the tank 22, and the solidswill be retained in the one section by the vertical filter 26. Theliquid portion of the human wastes passes through the filter and forms aliquid phase below the flushing fluid 24. Depending upon the dimensionsof the separating tank 22, it may be assumed that the tank will holdsufficient flushing fluid to fill the toilet tank 14, provide a fluidcharge standing in the toilet 12 above the trap, and provide a sealinglayer over the waste products with a reserve of fluid.

After the toilet has been used, operation of the flush mechanism permitsthe toilet tank 14 to empty into the bowl 12. The added weight of thetanks contents causes the fluid 24 to pass through the sanitary trap 18,thereby flushing the waste products through the drain 20 and into theseparating tank 22. The waste products are retained in the tank 22, andthe flushing fluid settles above the waste layer.

In one embodiment, as the intake float 32 is carried above a presetlevel, the pump 36 is energized and flushing fluid 24 is withdrawn fromthe separator tank 22. The flushing fluid 24 may include some fineparticles of paper or other foreign matter that have neither settled outnor have been excluded by the screen filter 26.

Some of these foreign particles are collected in the coalescer 38 andare returned to the waste side of the tank 22 through the return line42. The fluid is then passed through the filter 40, and the filteredliquid is returned to the toilet tank 14. So long as the float on theball cock valve is below the preset upper limit, fluid will be admittedto the tank 14. As the tank fills, the valve is closed and appropriatecircuits terminate the operation of the pump 36.

When sufficient waste has accumulated in the holding tank 22, the dumpvalve 28 is opened and the macerator-grinder 30 is energized to grindand comminute the accumulated waste products into a slurry, which iseasily pumped through a waste line 44 to either a storage tank (notshown) or an incinerator, such as is shown in Claunch, supra.

As in the prior art, the draining of the waste products can be initiatedand terminated by appropriate floats and/or level sensors, or may merelybe a manual operation initiated by an observation by the height of theflushing fluid component 24 in the tank 22. When the level of that fluid24 rises above a predetermined point, it may be safely assumed thatsufficient waste has accumulated for operation of the macerator pump.

The use of a floating intake assures an uninterrupted supply of thecleanest available flushing fluid in the tank 12. Because the tank 22may be provided with any desired volume, an excess accumulation ofwastes does not in any way jeopardize or limit the operation of theintake 32 and the pump 36. So long as there is some flushing fluid inthe tank 22, the floating intake 32 is arranged to withdraw that fluidfrom a point near the surface, avoiding contamination by the liquidwaste component which may be found in the tank.

Turning now to FIG. 2, there is shown, by way of example, amultiple-story dwelling including a plurality of toilets 112, each on adifferent level. Each toilet includes a toilet tank 114 and a connectionthrough a floor 116 and a conventional trap 118 to a common waste pipe120. The waste pipe 120 discharges into a large separating tank 122which can be substantially identical, except for scale, to the tank 22of FIG. 1.

Similarly, a pump 136, coalescer 138, and filter 140 are also includedin a fluid recirculating line that utilizes a floating intake 132 nearthe upper surface of the flush fluid 24 that is stored in the tank 22.

The output of the filter 140 is to a large storage tank 150, whichprovides, through a single output line 152,

flushing fluid to each of the toilet tanks 114 of the several toilets112. Alternatively, if appropriate flush controls are provided, such astimed valves, the individual tanks 114 may be omitted and the storagetank may connect directly to the toilet bowls 112.

As in the single toilet system of FIG.'1, each toilet 112 flushes in amore or less conventional manner, depositing a combination of wasteproducts and flushing fluid into the separating tank 122. As the levelof the flushing fluid 124 rises in the tank 122, the pump 130 can beenergized to transfer fluid from the separating tank 122 into thestorage tank 150. The storage tank 150 normally provides fluid throughthe refill line 152 to the several toilet tanks 114 after each toilethas been flushed.

In yet other embodiments, the separating tank can be modified byreplacing the vertical screen filter witha vertical partition or bafflethat does not extend to the top of the tank, but rather terminates atsome convenient, intermediate level. The height of the baffle isdetermined by the volume of waste products which may be stored prior todraining.

In these embodiments, the flushing fluid is initially found on bothsides of the partition with sufficient fluid for operation of thesystem. As in the other embodiments, the floating fluid intake rides ator near the surface of the flushing fluid in the filtered fluid part ofthe tank.

The separating tank receives the contents of a flushed toilet, and aninitial separation takes place merely in adding the mixture to the tank.Flushing fluid displaced by waste products flows over the partition intothe filtered fluid part of the tank. Since wastes are not comminuted orground, the separation does not require a screen filter. Any particulatematter that does find its way into the intake will be retrieved byeither the coalescer or the filter.

in this embodiment, however, some provision should be made to transferany waste products from the intake side of the tank to the waste side ofthe separator tank. This can be accomplished by permitting communicationbetween the tank portions at the base of the tank. Further, thepartition may terminate above the base of the tank to assure that thedump valve will be at or near the lowest point of the tank.

In order to improve the performance of the individual toilet bowls 112and to increase the aesthetic acceptance of such toilets, a nonstickcoating, which may be a Teflon compound, is applied to the inner surfaceof the bowl 112. This low-friction coating is deemed desirable since theflushing fluid is substantially immiscible with the waste products.

Normally, should waste material adhere to a conventional toilet bowl,the flush water tends to dissolve the matter and wash it from the bowl.Since the oil-based fluid utilized cannot dissolve the waste products,it is deemed important that the bowl surface be substantiallynonadherent at the outset to avoid such occurrences.

Thus there has been shown in several embodiments an improvedrecirculating toilet system utilizing a nonaqueous flushing medium, suchas an oil. The individual bowls are coated with a nonstick material,such as Teflon, to facilitate flushing and to assure that the bowlremains clean at all times.

An improved separating tank has also been shown which incorporates avertical screen filter. The separating tank is an inverted taper shape,being wider at the mouth than at the base. On the waste products side ofthe screen filter, a dump valve and macerator-grinder pump are locatedfor periodically removing the waste products from the separating tank.On the filtered side of the separating tank, a floating intake ismounted to withdraw flushing fluid from just below the surface.

A pump applies the withdrawn flushing fluid through a coalescer andfilter and returns it to the toilet tank. Where multiple toilets areplaced on the same system, each toilet is connected to a common wastedrain, which empties into a separating tank. The individual toilets areconnected to a fluid storage reservoir which is filled by the pump thatwithdraws flushing fluid from the separating tank.

The use of the vertical screen filter for dividing the tank, incombination with the floating fluid intake, assures that any delay inthe draining of the accumulated waste products will not result in aforcing of waste products through the screen filter and into the intakeof the pump, although some prior art systems would be susceptible tothis kind of failure should the tank not be drained after thepredetermined amount of waste material has been added. 7

It will be clear to those skilled in the art that other variants andmodifications of the present invention may be undertaken withoutdeparting from the spirit of the present invention. Accordingly, thescope of the invention should be limited only by the scope of the claimsappended hereto.

What is claimed as new is:

1. A recirculating toilet system comprising in combination:

a. toilet means having a bowl, including a substantially nonadheringinner surface to prevent retention of waste matter;

b. waste pipe means coupled to said toilet bowl for draining thecontents thereof;

c. nonaqueous flushing fluid, substantially immiscible with water andhuman wastes and having a relatively lower density and specific gravityfor floating thereon;

d. separating means including a separating tank connected to receive theoutput of said waste pipe means, said tank having a substantiallyvertical barrier means for providing a waste storage portion in saidtank;

e. flushing fluid intake means in said separating tank including a floatmember capable of floating substantially at the surface of said flushingfluid for withdrawing flushing fluid therefrom; and

f. fluid recirculating means coupled to said intake means and saidtoilet means, including filter and pump means for applying filteredflushing fluid withdrawn from said separating tank to said toilet meansfor use in disposing of wastes deposited therein.

2. A recirculating toilet system as in claim 1, above, further includingdrain means including a pump coupled to the base of said separating tankfor removing collected wastes therefrom.

3. The recirculating toilet system of claim 1, above, wherein saidbarrier means includes a screen member permeable to said flushing fluid.

4. The recirculating toilet system of claim 1, above, wherein saidflushing fluid intake means are mounted in the tank portion remote fromsaid waste storage portion.

5. A recirculating toilet system as in claim 1, above, wherein saidfluid recirculating means further include a coalescer and waste returnmeanscoupled to said separating means, for returning collected wastes tosaid waste storage portion thereof.

6. The recirculating toilet system of claim 1, above, further comprisingactuating means connectedto said fluid recirculating means'and operablein response to a predetermined raise in level of flushing fluid in saidseparating means for initiating operation of said fluid recirculatingmeans.

7. The recirculating toilet system of claim 1, above, wherein saidtoilet means further include a tank having afloat controlled valveassembly coupled to saidfluid recirculating means, for interim storageof flushing fluid.

8. The recirculating toilet system of claim 6, above, further includingcontrol means connected to said valve assembly and said fluidrecirculating means, for operating said filter and pump means inresponse to the state of said valve assembly.

9. A recirculating toilet system comprising in combination:

a. toilet means including a plurality of toilets, each having a bowl,including a substantially nonadhering inner surface to prevent retentionof waste matter;

b. waste pipe means coupled to each of said toilet bowls for drainingthe contents thereof;

c. nonaqueous flushing fluid, substantially immiscible with water andhuman wastes and having a relatively lower density and specific gravityfor floating thereon;

d. separating means including a separating tank connected to receive theoutput of said waste pipe means, said tank having a substantiallyvertical barrier means for providing a waste storage portion in saidtank;

e. flushing fluid intake means in said separating tank including a floatmember capable of floating substantially at the surface of said flushingfluid for withdrawing flushing fluid therefrom;

f. flushing fluid storage means coupled to said toilet means forsupplying flushing fluid thereto; and

g. fluid recirculating means coupled to said intake means and saidflushing fluid storage means, ineluding filter and pump means forapplying filtered flushing fluid withdrawn from said separating tank tosaid'storage means for use in disposing of wastes .deposited in saidtoilet means.

10. A recirculating toilet system as in claim 9, above, furtherincluding drain means including a pump coupled to the base of saidseparating tank for removing collected wastes therefrom. v

11. The recirculating toilet system of claim 9, above, wherein saidbarrier meansincludes a screen member permeable to said flushing fluid.

12. The recirculating toilet system of claim 9, above, wherein saidflushing fluid intake means are mounted in the tank portion remote fromsaid waste storage portion.

13. A recirculating toilet system as in claim 9, above, wherein saidfluid recirculating means further include a coalescer and waste returnmeans coupled to said separating means, for returning collected wastesto said waste storage portion thereof.

14. The recircluating toilet system of claim 9, above further comprisingactuating means connected to said fluid recirculating means and operablein response to a predetermined raise in level of flushing in saidseparating means forjinitiaitingioperation of.said fluifreclrculatirfiineans. 'wqw 15. The recirculating toilet system of claim 9, above,further including a plurality of flush control means respectivelyconnected to each of said toilets and said flushing fluid storage means,and each operable to apply a predetermined charge of flushing fluid tothe respective toilet'from said flushing fluid storage means.

1. A recirculating toilet system comprising in combination: a. toiletmeans having a bowl, including a substantially nonadhering inner surfaceto prevent retention of waste matter; b. waste pipe means coupled tosaid toilet bowl for draining the contents thereof; c. nonaqueousflushing fluid, substantially immiscible with water and human wastes andhaving a relatively lower density and specific gravity for floatingthereon; d. separating means including a separating tank connected toreceive the output of said waste pipe means, said tank having asubstantially vertical barrier means for providing a waste storageportion in said tank; e. flushing fluid intake means in said separatingtank including a float member capable of floating substantially at thesurface of said flushing fluid for withdrawing flushing fluid therefrom;and f. fluid recirculating means coupled to said intake means and saidtoilet means, including filter and pump means for applying filteredflushing fluid withdrawn from said separating tank to said toilet meansfor use in disposing of wastes deposited therein.
 2. A recirculatingtoilet system as in claim 1, above, further including drain meansincluding a pump coupled to the base of said separating tank forremoving collected wastes therefrom.
 3. The recirculating toilet systemof claim 1, above, wherein said barrier means include screen memberpermeable to said flushing fluid.
 4. The recirculating toilet system ofclaim 1, above, wherein said flushing fluid intake means are mounted inthe tank portion remote from said waste storage portion.
 5. Arecirculating toilet system as in claim 1, above, wherein said fluidrecirculating means further include a coalescer and waste return meanscoupled to said separating means, for returning collected wastes to saidwaste storage portion thereof.
 6. The recirculating toilet system ofclaim 1, above, further comprising actuating means connected to saidfluid recirculating means and operable in response to a predeterminedraise in level of flushing fluid in said separating means for initiatingoperation of said fluid recirculating means.
 7. The recirculating toiletsystem of claim 1, above, wherein said toilet means further include atank having float controlled valve assembly coupled to said fluidrecirculating means, for interim storage of flushing fluid.
 8. Therecirculating toilet system of claim 6, above, further including controlmeans connected to said valve assembly and said fluid recirculatingmeans, for operating said filter and pump means in response to the stateof said valve assembly.
 9. A recirculating toilet system comprising incombination: a. toilet means including a plurality of toilets, eachhaving a bowl, including a substantially nonadhering inner surface toprevent retention of waste matter; b. waste pipe means coupled to eachof said toilet bowls for draining the contents thereof; c. nonaqueousflushing fluid, substantially immiscible with water and human wastes andhaving a relatively lower density and specific gravity for floatingthereon; d. separating means including a separating tank connected toreceive the output of said waste pipe means, said tank having asubstantially vertical barrier means for providing a waste storageportion in said tank; e. flushing fluid intake means in said separatingtank including a float member capable of floating substantially at thesurface of said flushing fluid for withdrawing flushing fluid therefrom;f. flushing fluId storage means coupled to said toilet means forsupplying flushing fluid thereto; and g. fluid recirculating meanscoupled to said intake means and said flushing fluid storage means,including filter and pump means for applying filtered flushing fluidwithdrawn from said separating tank to said storage means for use indisposing of wastes deposited in said toilet means.
 10. A recirculatingtoilet system as in claim 9, above, further including drain meansincluding a pump coupled to the base of said separating tank forremoving collected wastes therefrom.
 11. The recirculating toilet systemof claim 9, above, wherein said barrier means include screen memberpermeable to said flushing fluid.
 12. The recirculating toilet system ofclaim 9, above, wherein said flushing fluid intake means are mounted inthe tank portion remote from said waste storage portion.
 13. Arecirculating toilet system as in claim 9, above, wherein said fluidrecirculating means further include a coalescer and waste return meanscoupled to said separating means, for returning collected wastes to saidwaste storage portion thereof.
 14. The recirculating toilet system ofclaim 1, above, further comprising actuating means connected to saidfluid recirculating means and operable in response to a predeterminedraise in level of flushing fluid in said separating means for initiatingoperation of said fluid recirculating means.
 15. The recirculatingtoilet system of claim 9, above, further including a plurality of flushcontrol means respectively connected to each of said toilets and saidflushing fluid storage means, and each operable to apply a predeterminedcharge of flushing fluid to the respective toilet from said flushingfluid storage means.